Mitsubishi Electronics AJ65bt-r2 ユーザーズマニュアル

10 - 8

MELSEC-A

10   TROUBLESHOOTING

(2) When calculating the terminator R value, connect a resistor R so that 1.3mA

or more flows to the connected resistor in order to satisfy the R2 OFF
current 1.7mA.
Therefore, a value for the resistor R can be calculated by the following
formulas.

I

R

 : I

Z

 = z (input impedance) : R (Resistance)

R 

≤

I

Z

I

R

× z =

1.7
1.3

× 3.3 = 4.3 (kΩ)

R 

<

 4.3k

Ω

When the resistance R is 3.9k

Ω

, power consumption W of the resistor R can

be calculated by the following formula.

W = (input voltage)

2

 ÷ R = 28.8

2

 (V) ÷ 3.9k(

Ω

) = 0.2 (W)

(3) The resistor power capacity is selected to be three to fives times the actual

power consumption, so connect a 3.9(k

Ω

)1.0(W) resistor to the problem

terminal.